L64704 LSI Logic Corporation, L64704 Datasheet - Page 204
L64704
Manufacturer Part Number
L64704
Description
Satellite Decoder Technical Manual 5/97
Manufacturer
LSI Logic Corporation
Datasheet
1.L64704.pdf
(220 pages)
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B.3.2
RC Values for
Clock Loop
B.3.3
VCO Gains
Table B.7
Typical Clock and
Carrier VCO Gains
B-16
R
R
To compute the RC values for the clock loop using
Equation 5.4
Table 5.2
This example uses the following values for each parameter:
Equation 5.3
Choose: C
Table B.7
values depend on whether your application requires fixed rate or variable
rate operation.
External Loop
Clock
Carrier
L64704 Application Notes
CLK 1
n
CLK 2
= 3900, and K
C
C
CLK
CLK
and set the damping factor
gives typical ranges for the clock and carrier VCO gains. The
CLK
on
and
=
=
= 30
=
= 1 F , R
------ -
------ -
page
2
--------------------------- -
1
VCO
n
3.9
2
Equation
n
VCO Gain (kHz/V)
100 to 2000
750 to 2500
=
10 seconds
K
--------------------------------
1
10
5-7, choose the natural frequency
= 1 MHz/V (assuming K
5
–
D
CLK1
3
3
2 K
2 M
10 seconds
2
–
5.4, the RC values in this example are:
4
= 30 k ,R
VCO
----------------------------------- -
0.92 2
2
2
CLK2
to 1 for fixed rate operation.
10
6
= 510
D
= 0.92). From
Equation 5.3
n
according to
= 1, M = 2,
and
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